package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.PasswordConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.EmployeeDTO;
import com.sky.dto.EmployeeLoginDTO;
import com.sky.dto.EmployeePageQueryDTO;
import com.sky.dto.PasswordEditDTO;
import com.sky.entity.Employee;
import com.sky.exception.AccountLockedException;
import com.sky.exception.AccountNotFoundException;
import com.sky.exception.PasswordErrorException;
import com.sky.mapper.EmployeeMapper;
import com.sky.result.PageResult;
import com.sky.service.EmployeeService;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.util.DigestUtils;

import java.time.LocalDateTime;
import java.util.List;

import static com.sky.constant.MessageConstant.PASSWORD_ERROR;

@Service
public class EmployeeServiceImpl implements EmployeeService {

    @Autowired
    private EmployeeMapper employeeMapper;

    /**
     * 员工登录
     *
     * @param employeeLoginDTO
     * @return
     */
    public Employee login(EmployeeLoginDTO employeeLoginDTO) {
        String username = employeeLoginDTO.getUsername();
        String password = employeeLoginDTO.getPassword();

        //1、根据用户名查询数据库中的数据
        Employee employee = employeeMapper.getByUsername(username);

        //2、处理各种异常情况（用户名不存在、密码不对、账号被锁定）
        if (employee == null) {
            //账号不存在
            throw new AccountNotFoundException(MessageConstant.ACCOUNT_NOT_FOUND);
        }

        //密码比对
        // DO 后期需要进行md5加密，然后再进行比对
        password = DigestUtils.md5DigestAsHex(password.getBytes());
        if (!password.equals(employee.getPassword())) {
            //密码错误
            throw new PasswordErrorException(PASSWORD_ERROR);
        }

        if (employee.getStatus() == StatusConstant.DISABLE) {
            //账号被锁定
            throw new AccountLockedException(MessageConstant.ACCOUNT_LOCKED);
        }

        //3、返回实体对象
        return employee;
    }

    @Override
    public void save(EmployeeDTO employeeDTO) {
        Employee employee = new Employee();
        BeanUtils.copyProperties(employeeDTO, employee);
        String password = PasswordConstant.DEFAULT_PASSWORD;
        employee.setPassword(DigestUtils.md5DigestAsHex(password.getBytes()));
        employee.setStatus(StatusConstant.ENABLE);
//        employee.setCreateTime(LocalDateTime.now());
//        employee.setUpdateTime(LocalDateTime.now());
//        //do:操作人
//        Long empId = BaseContext.getCurrentId();
//        employee.setCreateUser(empId);
//        employee.setUpdateUser(empId);
        employeeMapper.save(employee);
    }

    @Override
    public PageResult page(EmployeePageQueryDTO employeePageQueryDTO) {
        PageHelper.startPage(employeePageQueryDTO.getPage(), employeePageQueryDTO.getPageSize());
        List<Employee> records = employeeMapper.page(employeePageQueryDTO);
        for (Employee record : records) {
            record.setPassword("******");
        }
        Page<Employee> p = (Page<Employee>) records;
        return new PageResult(p.getTotal(), p.getResult());
    }

    @Override
    public void state(Integer status, Long id) {
        employeeMapper.state(status, id);
    }

    @Override
    public void update(EmployeeDTO employeeDTO) {
        Employee employee = employeeMapper.findById(employeeDTO.getId());
        BeanUtils.copyProperties(employeeDTO, employee);
//        employee.setUpdateUser(BaseContext.getCurrentId());
//        employee.setUpdateTime(LocalDateTime.now());
        employeeMapper.update(employee);
    }

    @Override
    public Employee findById(Long id) {
        return employeeMapper.findById(id);

    }

    @Override
    public void updatePassword(PasswordEditDTO passwordEditDTO) {
        // 查询员工信息
        Employee employee = employeeMapper.findById(BaseContext.getCurrentId());

        // 获取数据库中的密码
        String password = employee.getPassword();
        // 加密输入的旧密码
        String oldPassword = DigestUtils.md5DigestAsHex(passwordEditDTO.getOldPassword().getBytes());
        if (!password.equals(oldPassword)) {
            throw new PasswordErrorException(PASSWORD_ERROR);
        }

        // 设置新的密码、更新时间和更新用户
//        employee.setUpdateTime(LocalDateTime.now());
//        employee.setUpdateUser(BaseContext.getCurrentId());
        employee.setPassword(DigestUtils.md5DigestAsHex(passwordEditDTO.getNewPassword().getBytes()));

        // 更新数据库密码
        employeeMapper.updatePassword(employee);
    }

}
